The Blaster worm continued to tear through the Internet in August, followed almost immediately by an improved version of the SoBig worm, as security experts struggled to find and fix infected systems. Both worms present unique problems for security specialists because they are infecting a large number of pcs owned by home users, many of whom may be unaware that their machines are compromised. Even worse, SoBig may be laying in wait on infected machines, primed for a new attack on September 11, 2003. Don't miss our coverage of these worms and any other pests that crop up at www.pcmag.com/antivirus.